[Adger Smith]

My customers have had real good luck in Circle track engine with different brands of water wetter. I think they help prevent localized boiling of the water and keep steam build up to a minimum. I suspect that most of them are just a surfactant.The reduced surface tension keeps the water in contact with the metal and it allows heat transfer instead of building steam/bubbles. I recommend that they use any good brand. I have a couple of customers that are into custom cars and restorations. Both of them swear by the Evans product. They are mostly interested in keeping cool at idle and rust build up in the system. I have not personally used Evans product.